PKCα Inhibitor

Go 6983 is a pan-PKC inhibitor against for PKCα, PKCβ, PKCγ, PKCδ and PKCζ with IC₅₀ of 7 nM, 7 nM, 6 nM, 10 nM and 60 nM, respectively.

Midostaurin (PKC412; CGP 41251) is an orally active, reversible multi-targeted protein kinase inhibitor. Midostaurin inhibits PKCα/β/γ, Syk, Flk-1, Akt, PKA, c-Kit, c-Fgr, c-Src, FLT3, PDFRβ and VEGFR1/2 with IC₅₀s ranging from 22-500 nM. Midostaurin also upregulates endothelial nitric oxide synthase (eNOS) gene expression. Midostaurin shows powerful anticancer effects.

Bisindolylmaleimide I (GF109203X) is a cell-permeable and reversible PKC inhibitor (IC₅₀ of 20 nM, 17 nM, 16 nM, and 20 nM for PKCα, PKCβI, PKCβII, and PKCγ. Bisindolylmaleimide I is also a GSK-3 inhibitor.

Rottlerin, a natural product purified from Mallotus Philippinensis, is a specific PKC inhibitor, with IC₅₀ values for PKCδ of 3-6 μM, PKCα,β,γ of 30-42 μM, PKCε,η,ζ of 80-100 μM. Rottlerin acts as a direct mitochondrial uncoupler, and stimulates autophagy by targeting a signaling cascade upstream of mTORC1. Rottlerin induces apoptosis via caspase 3 activation. Rottlerin inhibits HIV-1 integration and Rabies virus (RABV) infection.

Sotrastaurin (AEB071) is a potent and orally-active pan-PKC inhibitor, with K_is of 0.22 nM, 0.64 nM, 0.95 nM, 1.8 nM, 2.1 nM and 3.2 nM for PKCθ, PKCβ, PKCα, PKCη, PKCδ and PKCε, respectively.

Bisindolylmaleimide III hydrochloride is a protein kinase C (PKC) inhibitor with IC₅₀ values of 0.26, 5.7, and 6 μM against PKCα, PKCδ, and PKCμ, respectively. Bisindolylmaleimide III hydrochloride also exhibits inhibitory activity against other off-targets, with IC₅₀ values of 0.17, 1, and 2 μM against SLK, adenosine kinase (AK), and CDK2, respectively; its K_i for NQO2 is 16.5 μM. Bisindolylmaleimide III hydrochloride selectively binds to activated Rsk1 following EGF stimulation, and serves as a tool for detecting the activation status of intracellular Rsk1 and PKCα, as well as for functional analysis of SLK. Bisindolylmaleimide III hydrochloride can be used in studies of signal transduction and colorectal cancer.

Darovasertib (LXS196) is a potent, selective and orally active protein kinase C (PKC) inhibitor, with IC₅₀ values of 1.9 nM, 0.4 nM and 3.1 μM for PKCα, PKCθ and GSK3β, respectively. Darovasertib has the potential for uveal melanoma research.

Enzastaurin (LY317615) is a potent, selective, and CNS-penetrant PKCβ inhibitor with an IC₅₀ of 6 nM, showing 6- to 20-fold selectivity over PKCα, PKCγ and PKCε.

CMPD101 is a potent, highly selective and membrane-permeable small-molecule inhibitor of GRK2/3 with IC₅₀ of 18 nM and 5.4 nM, respectively. CMPD101 exhibits less selectively against GRK1, GRK5, ROCK-2 and PKCα with IC₅₀s of 3.1 μM , 2.3 μM, 1.4 μM and 8.1 μM, respectively. CMPD101 can be used for the study of heart failure.

Ruboxistaurin (LY333531) is an orally active, selective PKC beta inhibitor (K_i=2 nM). Ruboxistaurin exhibits ATP dependent competitive inhibition of PKC beta I with an IC₅₀ of 4.7 nM. Ruboxistaurin inhibits PKC beta II with an IC₅₀ of 5.9 nM.

Ro 31-8220 mesylate is a potent PKC inhibitor, with IC₅₀s of 5, 24, 14, 27, 24 and 23 nM for PKCα, PKCβI, PKCβII, PKCγ, PKCε and rat brain PKC, respectively. Ro 31-8220 also significantly inhibits MAPKAP-K1b, MSK1, S6K1 and GSK3β (IC₅₀s, 3, 8, 15, and 38 nM, respectively), with no effect on MKK3, MKK4, MKK6 and MKK7. Ro 31-8220 mesylate can also inhibit the expression of MKP-1, induce the expression of c-Jun, and activate JNK, and these effects possess pharmacological properties independent of PKC.

BJE6-106 (B106) is a potent, selective 3^rd generation PKCδ inhibitor with an IC₅₀ of 0.05 μM and targets selectivity over classical PKC isozyme PKCα (IC₅₀=50 μM). BJE6-106 (B106) induces caspase-dependent apoptosis. BJE6-106 (B106) possesses tumor-specific effect.

VTX-27 is a selective protein kinase C θ (PKC θ) inhibitor, with K_is of 0.08 nM and 16 nM for PKC θ and PKC δ.

Ruboxistaurin (LY333531) hydrochloride is an orally active, selective PKC beta inhibitor (K_i=2 nM). Ruboxistaurin hydrochloride exhibits ATP dependent competitive inhibition of PKC beta I with an IC₅₀ of 4.7 nM. Ruboxistaurin hydrochloride inhibits PKC beta II with an IC₅₀ of 5.9 nM.

PKCβ inhibitor 1 is a potent, ATP-competitive, and selective PKCβ inhibitor with IC₅₀s of 21 and 5 nM for human PKCβ1 and PKCβ2, respectively. PKCβ inhibitor 1 exhibits selectivity of more than 60-fold in favor of PKCβ2 relative to other PKC isozymes (PKCα, PKCγ, and PKCε).

Bisindolylmaleimide I (GF109203X) hydrochloride is a cell-permeable and reversible PKC inhibitor (IC₅₀ of 20 nM, 17 nM, 16 nM, and 20 nM for PKCα, PKCβI, PKCβII, and PKCγ. Bisindolylmaleimide I hydrochloride is also a GSK-3 inhibitor.

TCS 21311 (NIBR3049) is a potent, highly selective JAK3 inhibitor with an IC₅₀ of 8 nM, it displays >100-fold selectivity over JAK1, JAK2 and TYK2. TCS 21311 (NIBR3049) inhibits PKCα, PKCθ, and GSK3β with IC₅₀s of 13, 68, and 3 nM, respectively.

Bisindolylmaleimide VIII acetate (Ro 31-7549 acetate) is a potent and selective protein kinase C (PKC) inhibitor with an IC₅₀ of 158 nM for rat brain PKC. Bisindolylmaleimide VIII acetate has IC₅₀s of 53, 195, 163, 213, and 175 nM for PKC-α, PKC-β_I, PKC-β_II, PKC-γ, PKC-ε, respectively. Bisindolylmaleimide VIII acetate facilitates Fas-mediated apoptosis and inhibits T cell-mediated autoimmune diseases.

PKC-theta inhibitor 1 is an orally active and selective ATP-competitive inhibitor of Protein Kinase Cθ (PKCθ), with a K_i value of 6 nM. PKC-theta inhibitor 1 inhibits T-cell-mediated inflammatory responses by suppressing the release of proinflammatory cytokines (IL-2 IC₅₀ = 0.21 μM in anti-CD3/CD28-stimulated PBMCs; IL-17 IC₅₀ = 1 μM in CD3/CD28-stimulated Th17 cells) PKC-theta inhibitor 1 significantly reduces symptoms in mice with ongoing experimental autoimmune encephalomyelitis (EAE). PKC-theta inhibitor 1 can be used for the study of T-cell-mediated inflammatory diseases such as multiple sclerosis.

MS-553 is a potent, ATP-competitive and reversible inhibitor of conventional PKC enzymes with K_is of 5.3 and 10.4 nM for human PKCβ and PKCα, and IC₅₀s of 2.3, 8.1, 7.6, 25.6, 57.5, 314, 808 nM for PKCα, PKCβI, PKCβII, PKCθ, PKCγ, PKC mu and PKCε, respectively.